7821. Propiolic Acid

Nomenclature

CAS number: 471-25-0
2-Propynoic acid; acetylenecarboxylic acid; propargylic acid.
C3H2O2; mol wt 70.05.
C 51.44%, H 2.88%, O 45.68%.

Description and references

Prepn: Wilson, Wenzke, J. Am. Chem. Soc. 57, 1265 (1935); Owen, Sultanbawa, J. Chem. Soc. 1949, 3109; Wolf, Ber. 86, 735 (1953); 87, 668 (1954). Manuf: Wolf, US 2786022 (1957); Pachter, US 2799703 (1957 to Ethyl Corp.). Review on its occurrence and biological activity: Reisch, Pharmazie 20, 194 (1965).

Chemical structure

Properties

Liquid at room temp (crystals from carbon disulfide, mp 9°). bp 144° (dec), bp10.5 54-55°, bp50 70-75°. d415 1.1435, d420 1.1380, d425 1.1325. nD20.4 1.4302. Dipole moment at 25°, 2.08D (in dioxane): Wilson, Wenzke, loc. cit.